Fuel-control mechanism



April 23, 1929. w. B BRONANDER 1,709,930

FUEL CONTROL MECHANISM Filed April 1, 1927 INVENTOR Patented Apr. 23, E929.

- marten stares rarest @EFFEQE.

WILHELM B. BRONANDER, F MONTCLAIR, NEW JERSEY. I

FUEL-CONTROL MECHANISM.

Application filed April 1,

I Furthermore, it is obvious that an internal combustion engine cannot run vithout fuel and the stoppage of the fuel supply will render the engine inoperative.

This invention has for its salient object to provide a simple and practicalfuel control mechanism so constructed and arranged that the fuel supply can be cut off by the engine operator or will be automatically out off in case of fire.

Further objects of the invention will appear from the following specification taken in connection with the drawings, which form a part of this application, and in which Fig. 1 is a sectional elevation of acarbureter constructed in accordance with the invention; v Fig. 2 is a sectional elevation of a slightly different form of the invention; Fig. 3 is a sectional elevation of a further embodiment of the invention; and

Fig. 4 is a sectional elevation similar to Figs. 2 and 3 but illustrating another type of carbureter having supplemental valve control mechanism thereon.

The invention briefly described consists of a fuel supply chamber for a carburetor having the usual float controlled valve therein and also having supplemental control mechanism adapted to automatically close this valve in case of fire.- In the forms of the invention illustrated the supplemental valve control-mechanism is carried by the cover of the carbureter float chamber and consists of a spring actuated lever adapted to close the 1927. Serial No. 180,316.

Further details of the invention will appear from the following description.

In the embodiment of the invention illustrated in Fig. 1 there is shown a carbureter float chamber 10 having an intake conduit 11 at the bottom thereof communicating with the float chamber through a port 12. The

float chamber is connected by a conduit 13 to a fuel nozzle let disposed in the intake P113015.

A fuel intake control valve 18 controls the passage of fuel from the intake conduit 11 through the port 12 and the valve 18 has a valve stem 19 extending upwardly through an opening 20 in the cover 21 of the float chamber.

A float 22 is slidably mounted on the valve stem 19 and engages a washer 23 secur'ed'to the valve stem when the fuel in the float chamber reaches a predetermined level. The

float will thereupon close the valve 18, cutting ofi chamber.

The supplemental wave control or operating mechanism is mounted on the cover 21 and consists of a bell crank lever havin one arm 25 extending into a slot 26 forme in the upper end of the valve stem 19, the

arm 25 being acted on by a spring 27 pcsit-ioned in a recess 28 in the cover and pressing upwardly on the arm.

The other arm 30 of the bell crank lever extends upwardly from the lever pivot 31 and is engaged by a link 35 of fusible metal,

the supply of fuel to the floatthe other end of the link being secured over a book 36 formed on the cover 21. The fusible link 35 is so dimensioned as to prevent the arm 25 of the bell crank lever from acting on the valve stem 19under normal conditions. In case of fire, however, the link 35 gives way, permitting the spring 37 to force the arm 25 upwardly, thus effecting the closing of the valve 18 without movement of the float and cutting off the supply of fuel from the fuel supply conduit to the float chamber 10. I 7

It is obvious that the car operator can remove the link 35 if desired, thus permitting the s ring-27 to close the fuel intake to the car ureter. This will obviously prevent the motor from running and will prevent theft or unauthorized use of the car.

In the embodiment of the invention shown in Fig. 2, the float chamber 10 has a needle valve 40 formed on a valve stem 41 which extends upwardly through the float chamber cover 42.

The stem 41 has mounted thereon a circumferentially grooved collar 43 and. a pair of levers 44- are pivoted at 45 to lugs 46 which extend downwardly from the cover 42 The inner ends 47 of the levers are spherical in shape and are disposed in the groove of the collar 43 and the outer ends of the levers are provided with balls 48 adapted to rest on the upper surface of the float 49. The float 49 is slidably mounted on the stem 41.

It will be obvious that when the fuel level in the carburetor rises the float will tilt the levers and at a predetermined fuel level the needle valve 40 will be closed, thus cutting ofi the fuel supply from the float chamber.

Supplemental means is provided for operating the needle valve independently of the float. at 50 to lugs 51 formed on and extending upwardly from the cover 42. One end 52 of the lever is disposed above the needle valve and the other end of the lever is acted on by a spring 53 and is engaged at its outer end 54 by a fusible link 55, the opposite end of the link being secured to a. lug 56 formed on an arm 57 carried by and depending from the cover 42.

The operation of the supplemental valve control means shown in Fig. 2 will be obvious.

In Fig. 3 a slightly different form of carbureter is illustrated. This carbureter has a float chamber 60, a fuel inlet conduit 61,

and a needle valve 62 controlling the admission of fuel from the conduit .61 to the chamber 60. A float 65 is positioned in the chamber and engages a lever 66 mounted on a fixed pivot 67 and having its opposite end engaging. the needle valve as shown at 68.

The supplemental valve control or operating means-in this case consists of a lever mounted on a pivot 70 carried by lugs 71 formed on the cover 72 of the carburetor floatchamber. One arm 73 of the lever is disposed above the needle valve 62. Another arm 74 of the lever is acted on by a spring 75 which tends to depress the arm 73. The lever is also provided with an upwardly extending arm 78 engaged at its outer end 79 by a fusible link 80, the opposite end of the link being secured over a lug 81 formed on and extending upwardly from the cover 72. The operation of this embodiment of the invention will be obvious.

In the embodiment of the invention shown in Fig. 4 there is shown a carburetor float chamber 85 having a fuel inlet conduit 86 controlled by a needle valve 87 which in turn is controlled by a float 88 pivoted at 89- This means consists of a lever pivoted to lugs depending from the cover 90. The float has 0. lug 91 extendng upwardly therefrom and engageable with the needle valve 87.

Inorder to automatically close the needle valve in case of fire an L--shaped arm 95 is mounted in a slot 96 formed in the wall of the float chamber and has .one end 97 adapted to engage the float when the arm is moved about its pivot in the slot 96.

The other end 98 of the arm is engaged by a compression spring 99 and is engaged atits outer end by a fusible link 100, the opposite end of the link being secured to a hook 101 carried by a bracket 102 secured to the float chamber as shown at 103. It will be obvious that when the fusible link melts the spring will swing the arm 95 about its pivot in the slot 96 and cause the end 97 of the arm to engage the float 88 and swing the float on its pivot 89 to cause the lug 91 to engage the needle valve 87 andclose the fuel intake conduit 86.

From the foregoing specification it will be clear that: simple and practical means have been provided for automatically cut ting off the supply of fuel from a carburetor in case of fire or for rendering the engine inoperative by cutting off the fuel supply. Furthermore, it is evident that the supplemental valve control means described can be easily and readily attached to carbureters now on the market by simply removing the carburetor covers and substituting therefor a. cover having the supplemental valve control device thereon. This change will obviously require a very short time for its accomplishment and the expense will be very slight.

Although certain specific embodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claims.

\Vhat I claim is:

1. A fuel supply chamber, conduit for said chamber, a valve for controlling the admission of fuel to said chamber from said conduit, a float for operating the valve, a heat responsive means for operating said valve without movement of said float.

2. In a carbureter a float chamber, a float therein, a valve operatively connected to and controlled by said float, a cover for said float chamber, and heat responsive mechanism carried by said cover for operating said valve without movement of the float.

3. In carburetor a float chamber, a float therein, a valve operatively connected to and controlled by said float, a. cover for said a fuel supply 7 ion actuated mechanism carried 'by said cover for operating said valve Without movement I of the float.

4. A fuel supply chamber, a fuel supply conduit for said chamber, a valve for controlling the admission of fuel to said chamher from said conduit, a float for operating the valve, means operative to close said valve Without movement of said float, and heat responsive means for normally-holding said means inoperative.

5. A fuel supply chamber, a fuel supply conduit for said chamber, a valve for controlling the admission ()f fuel to said chamber from said conduits, a float for operating the valve, spring actuated means operative to close said valve without movement of said float, and heat responsive means for normally holding said means inoperative.

6. In a carbureter a float chamber, a float therein, a valve controlled by said float, a cover for said float chamber, and heat responsive mechanism carried by said cover for operating said valve, said mechanism comprising a spring, a lever engaged by said spring and engageable with said valve,

and removable means for holding said lever inoperative.

7 In a carburetor a float chamber, a float therein, a valve controlled by said float, a

cover for said float chamber, and heat responsive mechanism carried by said cover for operating said valve, said mechanism 7 comprising a spring, a lever engaged by said spring and engageable with said valve, and fusible means for holding said lever inoperative.

8. fuel supply chamber, a fuel supply conduit for said chamber, a valve for controlling the admission of fuel to said chamber from said conduit, operating means for said valve, and heat responsive means for operating said valve Without movement of said first means.

9. In a carbureter, a fuel supply chamber, a fuel supply conduit for said chamber, a cover for said chamber, a valve in said conduit, means for operating said valve, and other means for operating said valve comprising heat responsive mechanism including a lever carried by said cover.

10. A fuel supply chamber, a fuel supply conduit for said chamber, a valve for controlling the admission of fuel to the chamber from the conduit, a float connected to operate said valve, and heat responsive mechanism for closing said valve, said mechanism including a lever operatively connected to the valve, a spring connected to the lever for actuating the lever to close the valve, and heat responsive means for holding the lever against actuation by said spring.

In Witness whereof, I have hereunto set my hand this th day of March, 1927.

WILHELM B. BRONANDER. 

